. American engineer and railroad journal . es and are provided with what is known asa pneumatic pulley, overcoming the necessity for tight belts,with a consequent saving in power. The top and bottom spin-dles are equipped with patent side-clamping boxes, which may be easily and accurately adjusted. The belt driving the tophead has an adjustable tightener, by means of which theslack may instantly be taken up and permitting no greaterstrain than is necessary when running on a lighter class ofwork. The bars that carry the adjustable cutter shoes, over theunder cutter and directly back of the top
. American engineer and railroad journal . es and are provided with what is known asa pneumatic pulley, overcoming the necessity for tight belts,with a consequent saving in power. The top and bottom spin-dles are equipped with patent side-clamping boxes, which may be easily and accurately adjusted. The belt driving the tophead has an adjustable tightener, by means of which theslack may instantly be taken up and permitting no greaterstrain than is necessary when running on a lighter class ofwork. The bars that carry the adjustable cutter shoes, over theunder cutter and directly back of the top cutter head, arehinged and may be thrown back; they are supported at bothends and each shoe is vertically adjustable by a screw andhand wheel. The chip breaker and hood for the top headmay be thrown up and back across the machine, giving freeaccess to the top head. The side head may be set to anyangle and moved vertically and laterally without changingthe angle, and one movement of the lever locks the headstock at both the top and UPLIFTED BARS. CHIP BREAKER SWUNG UP AND SLID ALONG,GIVING FREE ACCESS TO CUTTER HEAD KNIVES. There is a lever adjustment for the independent bed-platesection before the bottom head, for unlocking and adjustingwithout the use of a wrench. The cutter heads are provided with vertical and lateraladjustments and have a normal cutting circle of 6 ins. Thetop head cutters project 3 ins., giving a cutting swing of 6ins. over the normal cutting circle, making 12 ins. maximumswing. The under cutter head is provided with an adjustableplate each side of the head, allowing the knives to project3 ins. The inside head has an adjustable chip breaker andguide, allowing the knives to project 2% ins. The outsidehead has a combined chip breaker and guide, allowing theknives to project 2% ins. Four rates of feed are provided:17, 25, 34 and 49 ft. per minute. The weight of the is 7,200 lbs. These machines are made by theAmerican Wood Working Machine
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
